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NEW YORK — A veterinarian accused of implanting packets of liquid heroin into the abdomens of puppies in order to illegally transport the drugs into the United States has finally been brought to the U.S. after fighting extradition.

The scheme was disrupted back in 2005 by U.S. and Colombian drug agents, according to WPIX. While a variety of other people involved in the operation were arrested and convicted, Andres Lopez Elorez, 38, fled his native Colombia. He was arrested in late 2015 in Spain, where he fought extradition to the U.S.

That fight ended on Monday when U.S. Drug Enforcement Agents were able to take him into custody in New York.

On Tuesday, Lopez Elorez went before a judge and pled not guilty to trafficking heroin through means that are considered unorthodox, to say the least.

"It's just all around bad," said Phyllis Taiano. She's the founder of For Paws Sake NYC, an animal rescue organization. Through her efforts, the lives of hundreds of dogs have been saved. That includes Taiano having gotten medical help for many of them. It's legitimate help, as opposed to the surgeries done on the seven puppies, she pointed out.

"To sedate a puppy twice in one week's time is a huge risk," Taiano told WPIX. Complications can arise from sedation, and infection is a constant concern, she said.

At the hearing on Tuesday, the judge ordered permanent detention for Lopez Elorez pending trial.

Meanwhile, the dog rescuer said she wants the harshest overall punishment if the veterinarian is found guilty. "I can't say [in public]," Taiano told WPIX. "Life?"

Since the puppies were seized in 2005, all have apparently died, but some lived happy and interesting lives. Two became pets, one for the family of a Colombian National Police, or CNP, officer. Another of the dogs ended up being trained as a drug-sniffing dog for the CNP.

Lopez Elorez's next court appearance is in June. He has requested a speedy trial.